Vacuum cleaner



FIG. 1 is a front perspective view of a vacuum cleaner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is an enlarged top view of the vacuum cleaner;

FIG. 6 is an enlarged front perspective view of a lower portion of the vacuum cleaner shown in FIG. 1; and,

FIG. 7 is an enlarged front view of a lower portion of the vacuum cleaner shown in FIG. 2.

The details of the vacuum cleaner shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 